"Why would the mother be angry? She is not that unreasonable of a person to be angry at any small things."
Rose looked at Alex in confusion not understanding why Alex said that her mother would be angry. She knew her mother is not like her sister Alia who can get angry at anything that get in her way.
Helen only gets angry with someone under two conditions, 1st Someone did not honour her command and 2nd someone insulted her, So there is no way her mother could be angry at this time as there is no one in this city who would do any of those things.
As for Alex telling her that he rejected the offer of marrying her mother, She did not take it to heart thinking it as he was messing with her and trying to get back at her for insulting him.